Apparatus for building up with deposited metal the seating surfaces of valves

ABSTRACT

Valve facing apparatus including an induction heater, cooling means directed at the backside of the valve to effect a temperature gradiant and a rotatable electromagnetic chuck which is actuated by means disposed within the chuck and responsive to positioning of the valve stem therein.

United States Patent [191 [111 3,911,859

Dudko et al. 1 Oct. 14, 1975 [54] APPARATUS FOR BUILDING UP WITH [58]Field of Search 279/1 M; 118/503, 1, 4; DEPOSITED NIETAL THE SEATING33/DIG. l; 219/95, 85; 269/8; 335/1, 8, 9, SURFACES 0F VALVES 10; 51/266[76] Inventors: Daniil Andreevich Dudko, pereulok Mechnikova, 3, kv. 7;Boleslav [56] References cued Ivanovich Maximovich, Bulvar Lesi UNITEDSTATES ATENTS Ukrainki, 2, kv. 52; Konstantin 2,637,115 5/1953 Watson33/D1G. 1 Petrovich Bykovets, Prospekt 40 3,504,148 3/1970 Maximovich eta1. 219/95 Okyabrya 52; FOREIGN PATENTS OR APPLICATIONS VoitsekhovichZavodyan, Bulvar Ivana Lepse, 55, kv' 20, all of Kiev, 743,582 l/1956United Kingdom 118/620 U.S.S.R.

Primary ExammerMorris Kaplan [22] Filed: Mar. 1, I971 21 Appl. No.:119,934 ABSTRACT Valve facing apparatus including an induction heater,Relted Apphcatlon Data cooling means directed at the backside of thevalve to [63] f of 808928 March P effect a temperature gradiant and arotatable electroa andone magnetic chuck which is actuated by meansdisposed U S Cl 118/1. 118/69 118/503 within the chuck and responsive topositioning of the 1 M valve stem therein. [51] Int. Cl. B05c 9/14 9Claims, 2 Drawing Figures o W Z Sheet 2 of 2 3,911,859

U.S. Patent 0a. 14, 1975 APPARATUS FOR BUILDING UP WITH DEPOSITED METALTI-IE SEATING SURFACES OF 1 VALVES This application is a continuation ofapplication Se'r. No. 808,928, filed Mar. 20, 1969,:nowabandoned.

The proposed invention relates to the manufacturing of internalcombustion engines and, more specifically, it concerns apparatus formetal deposition on-seating faces of valves. 1

The present invention may bealso used for building up by metaldeposition components-for chemical and oil engineering equipment, aswell as for steam and gas turbines.

Known in the prior art are apparatus for building up by metal depositionseating faces of valves comprising two inductors.

' One of these inductors is used for melting down the flux intended forchemical cleaning of the valve surfaces to be subjected to the metaldeposition, and the other inductor is used for melting down the metalemployed as a deposit.

The building up of seating surfaces of a valve is carried into effect byimmersing the valve by means of a manipulator first into an inductorwith molten flux and then into an inductor containing molten metal to bedeposited.

The existing apparatus suffers from a number of disadvantages; they donot provide the necessary conditions for allowing directedsolidification of the metal being deposited, are associated withaconsiderable consumption of this metal and with the need in anadditional mechanical working of the built-up valves.

, An object of the present invention is to eliminate the above-saiddisadvantages.

The principal object of the invention is to provide an apparatus formetal deposition on seating faces of valves, which ensures a highquality structure of the metal being deposited at the minimumconsumption thereof.

This object is attained by providing an apparatus for effecting metaldeposition on seating faces of valves featuring an inductor for heatingthe valves, in which, according to the invention, there is employed acooling system ensuring a temperature drop within the metal beingdeposited for allowing its directed solidification, and a clampingdevice for fixing the valve in such a position relative to the inductor,in which the metal deposition on the seating face of the valve iscarried into effeet.

The clamping device of the proposed apparauts may be provided with apickup indicating the position of the valve relative to the inductorduring the process of deposition, and also with an actuating mechanismrigidly securing the valve upon the reception of a signal from thepickup.

In order to provide for a uniform heating of the seating faces of thevalve and for convenient readjustment of the apparatus for the metaldeposition on seating faces of valves of different sizes, the holdingdevice is preferably provided with a drive ensuring rotation of theclamping device about its axis and its vertical displacement relative tothe inductor.

Other objects and advantages of the present invention will becomeapparent from a consideration of the following detailed description ofits exemplary embodiment, taken in conjunction with the accompanyingdrawings, in which:

FIG. l is a general view of the apparatus according tothe invention;FIG. 2 is a holding device in a longitudinal section, according to theinvention. j The proposed apparatus for metal deposition on seatingfaces of valves comprises a bed 1 (FIG: 1) with a column 2 on whichthere are mounted a coolingsystem 3, a control board 4', and aworking-head 5. The working head 5 includes a holding device 6, having apickup 7 (FIG. 2) indicating the position of the valve and an actuatingmechanism 8; a drive 9 (FIG. 1) for rotating the clamping device 6, anda drive 10 for its vertical displacement. Also mounted on the bed 1 is adraining tank I l. The apparauts is provided with an inductor l2 fixedto the post 13 for high-frequency heating. The cooling system 3 isadapted for vertical movement along the column 2, and is used forsupplying a coolant to the end face of the valve to provide atemperature gradient within the metal being deposited for allowing itsdirected solidification.

The head 5 is capable of moving along the column 2 in verticaldirection. The clamping device 6 is employed for fixing the valve insuch a position relative to the inductor 12, so that the metaldeposition on the valves is carried into effect. The checking of thisposition is effected by the pickup 7 indicating the valve position (FIG.2). The actuating mechanism 8 which is a part of the clamping device 6(FIG. 1), upon the reception of a signal from the pickup 7 indicatingthe valve position, fixedly secures the valve to be built-up withdeposited metal. The drive 9 rotating the clamping device 6 andmechanically coupled thereto makes the clamping device 6 rotate at apredetermined speed. This contributes to the uniform heating of thevalve being built-up with deposited metal.

The drive 10 for effecting vertical movement of the holding device 6makes it possible to set the built-up valve of any size in a definiteposition relative to the inductor 12. The draining tank 11 is used forthe collecting and removing of the liquid coolant.

For effective metal deposition on a seating surface of a valve, theproposed apparatus is controlled through a preset program of the processof metal deposition (necessary rotational speed of the clamping device6, control of the power of the high-frequency heating post 13 and theoperation time of these devices, the moment of operation of the coolingsystem 3, duration of supply of the coolant and the toatal time of thecycle).

All these preliminary operations are effected by means of the equipmentmounted on the control board 4 as well as on the panel of thehigh-frequency heating post 13.

The apparatus for metal deposition on seating faces of valves operatesas follows.

The valve prepared for the metal deposition is taken by the operatorwith the valve rod directed upwardly and introduced into the clampingdevice 6 up to the rest.

In this case, the pickup 7 indicating the position of the valve switcheson the apparatus, and the latter instantly energizes the actuatingmechanism 8 for rigidly securing the valve to be built-up with depositedmetal in this working position.

After 1-2 seconds the apparatus automatically applics the voltage to thedrive 9 for rotating the clamping device 6 and to the inductor I2.

After the predetermined period of time having been preset by theprogram, the apparatus automatically changes the operating conditions ofthe high-frequency heating post 13, supplying the inductor l2, andthrough the cooling system 3 feeds the coolant to the end face of thevalve to be built-up with deposited metal.

In this case, a temperature drop is created within the metal beingdeposited, thus resulting in its directed solidification.

At the end of the cycle of the metal deposition, which is preset by theprogramm, the apparatus for metal deposition on seating faces of valvesand the highfrequency heating post 13 supplying the inductor 12 areautomatically cut off.

The operator removes the deposited valve and inserts the next valveprepared for the deposition.

the proposed apparatus makes it possible to obtain directedsolidification of the metal being deposited, and this fact provides fora high quality of the built-up valves, reduces the consumption ofextensive materials used in the process of metal deposition and,therefore, cuts the cost price of the built-up valves.

Furthermore, the apparauts may be introduced into the production lineintended for mass production of valves at a specialized manufacturingplant.

We claim:

1. An apparatus for building up the seating sur aces of valves withdeposited metal comprising an inductor for heating a valve, coolingmeans for decreasing the temperature with in said valve and causingdirected solidification of said deposite metal, an electromagnetic chuckmeans for fixedly securing said valve in a position relative to saidinductor for permitting the deposition of metal on the seating surfaceof said valve by inductive heating of said valve, and means actuatingsaid electromagnetic chuck means upon introduction of the valve therein.

2. Apparatus according to claim 1, wherein said actuating means isoperative when a predetermined position of the valve is reached.

3. An apparatus according to claim 1, wherein said chuck is rotatableabout an axis and displaceable therealong and means for rotating saidchuck means about its axis and for vertically displacing said chuckmeans relative to the inductor.

4. An apparatus according to claim 2, wherein said chuck means isrotatable about an axis and displaceable therealong, said apparatusfurther comprising means for rotating said chuck means about its axisand for vertically displacing said chuck means relative to the inductor.

5. An apparatus according to claim 3, wherein said actuating means isoperative when a predetermined position of the valve is reached.

6. An apparatus according to claim 5, wherein said cooling meanscomprises means for directly supplying a coolant to said valve on thesurface thereof opposite the seating surface on which deposited materialis being built up 7. An apparatus according to claim 6, comprising meansfor vertically moving said cooling means relative to said valve.

8. An apparatus according to claim 3, whereinn said means for rotatingsaid chuck means operates at a uniform speed.

9. An apparatus according to claim 7, wherein said means for rotatingsaid chuck means Operates at a uniform speed.

1. An apparatus for building up the seating sur aces of valves withdeposited metal comprising an inductor for heating a valve, coolingmeans for decreasing the temperature with in said valve and causingdirected solidification of said deposite metal, an electromagnetic chuckmeans for fixedly securing said valve in a position relative to saidinductor for permitting the deposition of metal on the seating surfaceof said valve by inductive heating of said valve, and means actuatingsaid electromagnetic chuck means upon introduction of the valve therein.2. Apparatus according to claim 1, wherein said actuating means isoperative when a predetermined position of the valve is reached.
 3. Anapparatus according to claim 1, wherein said chuck is rotatable about anaxis and displaceable therealong and means for rotating said chuck meansabout its axis and for vertically displacing said chuck means relativeto the inductor.
 4. An apparatus according to claim 2, wherein saidchuck means is rotatable about an axis and displaceable therealong, saidapparatus further comprising means for rotating said chuck means aboutits axis and for vertically displacing said chuck means relative to theinductor.
 5. An apparatus according to claim 3, wherein said actuatingmeans is operative when a predetermined position of the valve isreached.
 6. An apparatus according to claim 5, wherein said coolingmeans comprises means for directly supplying a coolant to said valve onthe surface thereof opposite the seating surface on which depositedmaterial is being built up.
 7. An apparatus according to claim 6,comprising means for vertically moving said cooling means relative tosaid valve.
 8. An apparatus according to claim 3, whereinn said meansfor rotating said chuck means operates at a uniform speed.
 9. Anapparatus according to claim 7, wherein said means for rotating saidchuck means operates at a uniform speed.